﻿78 
  PALEONTOLOGY 
  OF 
  ILLINOIS 
  

  

  margin, 
  coronal 
  enamel 
  apparently 
  forming 
  a 
  narrow 
  fold, 
  basal 
  

   border 
  not 
  preserved; 
  inner 
  margin 
  broadly 
  arcbed 
  from 
  the 
  

   subacute 
  posterior 
  angle 
  round 
  tbe 
  base 
  of 
  tbe 
  coronal 
  prominei 
  

   tbence 
  with 
  a 
  slight 
  concavity 
  on 
  the 
  way 
  to 
  the 
  obtuse 
  anterior 
  

   angle, 
  worn 
  specimens 
  inbeveled 
  below. 
  Two- 
  thirds 
  or 
  more 
  of 
  the 
  

   coronal 
  surface 
  is 
  occupied 
  by 
  tbe 
  posterior 
  lobe 
  or 
  prominen 
  

   which 
  is 
  gently 
  and 
  regularly 
  arched 
  transversely, 
  the 
  anterior 
  

   slope 
  descending 
  into 
  the 
  very 
  shallow 
  concavity 
  of 
  the 
  anterior 
  

   portion 
  of 
  tbe 
  crown, 
  which 
  is 
  abruptly 
  truncated 
  at 
  the 
  articular 
  

   border; 
  surface 
  marked 
  by 
  irregularly 
  spaced 
  transverse 
  undula- 
  

   tions, 
  which 
  are 
  nearly 
  obsolete 
  in 
  worn 
  specimens, 
  and 
  producii 
  

   a 
  banded 
  appearance 
  conforming 
  in 
  outline 
  to 
  the 
  inner 
  margin 
  ; 
  

   the 
  punctffl 
  are 
  small, 
  moderately 
  closely 
  arranged 
  and 
  uniform, 
  

   savejn 
  the 
  axes 
  of 
  the 
  transverse 
  furrows 
  where 
  they 
  often 
  present 
  

   irregular 
  elongate 
  orifices. 
  The 
  surface 
  of 
  the 
  dense 
  inferior 
  la] 
  

   is 
  smooth 
  or 
  irregularly 
  striated 
  longitudinally. 
  The 
  tooth 
  is 
  very 
  

   thick 
  and 
  massive 
  beneath 
  the 
  coronal 
  prominence, 
  whence 
  its 
  sub- 
  

   stance 
  gradually 
  diminishes 
  in 
  thickness 
  towards 
  the 
  lateral 
  

   borders. 
  Greatest 
  breadth 
  of 
  tooth 
  across 
  the 
  inner 
  margin 
  1." 
  

   m 
  m, 
  length 
  of 
  antero-lateral 
  border 
  to 
  point 
  of 
  enrollment 
  proba- 
  

   bly 
  nearly 
  22 
  m 
  m, 
  or 
  in 
  the 
  neighborhood 
  of 
  two-thirds 
  that 
  of 
  the 
  

   postero-lateral 
  border. 
  

  

  The 
  description 
  is 
  founded 
  upon 
  a 
  unique 
  example 
  purportin 
  

   have 
  been 
  derived 
  from 
  a 
  locality 
  on 
  the 
  Warsaw 
  limestone 
  near 
  

   Bedford, 
  Indiana. 
  The 
  tooth 
  is 
  unmistakably 
  congeneric 
  with 
  the 
  

   form 
  noticed 
  under 
  the 
  name 
  Tamiodtu 
  faaciahu, 
  bnt 
  representing 
  a 
  

   somewhat 
  larger 
  and 
  more 
  entire 
  individual. 
  It 
  i-. 
  however, 
  

   •ilically 
  distinguishable 
  from 
  the 
  latter 
  by 
  the 
  proportionately 
  

   iter 
  breath 
  and 
  transversely 
  more 
  regularly 
  arched 
  coronal 
  

   prominence, 
  which 
  does 
  not 
  exhibit 
  the 
  sudden 
  deflection 
  in 
  the 
  

   course 
  of 
  the 
  transverse 
  undulations 
  noticeable 
  in 
  the 
  above 
  cited 
  

   -in 
  oies. 
  

  

  Geological 
  position 
  and 
  l<>,;ilit;i 
  .■ 
  Warsaw 
  limestone, 
  near 
  Bedford, 
  

   Lawrenoe 
  County, 
  Indiana. 
  

  

  mom 
  s 
  obliqdi 
  -. 
  si. 
  .1. 
  and 
  W. 
  

  

  PL 
  Mil. 
  I 
  .:. 
  l". 
  

  

  Maxillary 
  pi 
  hum 
  si/r. 
  obliquely 
  trapezoidal 
  

  

  in 
  oiitlin. 
  . 
  BOm< 
  what 
  Btrongl] 
  arch, 
  d 
  En 
  ui 
  Within 
  outwards. 
  And 
  

  

  lateral 
  border 
  obliquely 
  produced 
  outward 
  and 
  forward 
  at 
  an 
  an 
  

   about 
  20 
  with 
  a 
  righl 
  hue 
  connecting 
  the 
  u 
  "f 
  the 
  

  

  